Well, Man City this season is a little different. Because Gundogan had left and joined Barcelona at the start of the season. But De Bruyne's figure seems to be quite reliable there. After De Bruyne recovered and returned, we could see that the attack built by Man City became more well organized, just like when Gundogan was present.
Real Madrid does have a good attacking midfielder like Bellingham who is even able to score lots of goals like a striker. And the young players at Real Madrid can also be relied on. So Real Madrid will actually continue to experience improvement from season to season. But I can't predict which team will score more goals. But if Real Madrid fails to keep Haaland tight, then Man City could score first.
Gundogan's move to Barcelona I don't think it really affected Manchester City's performance, because after all Bruyne can still play a more vital role for Manchester City at the moment, and I think compared to Gundogan, De Bruyne is obviously better in terms of quality and also his game performance so far, at the moment it is reported that De Bruyne has suffered an injury after he also missed Belgium in international matches and if indeed the injury he has is severe Then it is certain that he will be absent for quite a long time.
I think if later De Bruyne really missed the game against Madrid, then of course Madrid will benefit greatly because indeed De Bruyne has been a vital player for Manchester City, and even when De Bruyne was injured greatly affected Manchester City performance in the league, about Belingham, of course now he is able to incarnate as a dangerous attacking midfielder and even he is able to be the difference in every game Madrid plays, Bought for quite a Expensive from Dortmund it turns out that Belingham is able to show his capacity with every goal and assist he presents for Madrid at the moment, I think if later maybe De Bruyne plays of course the game will be a battle for two of the best midfielders at the moment.